Malicious PDF — malware analysis report

Static analysis result for SHA-256 6166a5c02444b086…

MALICIOUS

PDF

89.7 KB Created: 2021-05-29 13:35:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e601df35a974a172c8eeb45791930ee0 SHA-1: 9e7c8a7912c5e78642572ec9639727f395e8f90c SHA-256: 6166a5c02444b08685631dd2573256c60e75e417cd11a57beb5782b20f21d0e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a phishing lure, specifically a fake movie download link. The presence of numerous external PDF links, identified by the PDF_SEO_LINK_FARM heuristic, suggests an attempt to create a link farm or distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://nipisod.ru/strik?utm_term=tumsa+nahin+dekha+full+hd+hindi+movie+download
    • https://cdn-cms.f-static.net/uploads/4412999/normal_606629026deb5.pdf
    • https://katebobuwusa.weebly.com/uploads/1/3/1/3/131384636/dikikexuso_linatut_milud_talipazigi.pdf
    • https://cdn-cms.f-static.net/uploads/4468253/normal_604d7015d4820.pdf
    • https://zanebereraba.weebly.com/uploads/1/3/4/4/134472179/tegubodifiwidux.pdf
    • https://static.s123-cdn-static.com/uploads/4475988/normal_5fc726b0216ba.pdf
    • https://cdn-cms.f-static.net/uploads/4453329/normal_5fdaadfa834a8.pdf
    • https://cdn-cms.f-static.net/uploads/4476954/normal_605a63a6da264.pdf
    • https://cdn-cms.f-static.net/uploads/4393370/normal_60470ea9a597e.pdf
    • https://cdn-cms.f-static.net/uploads/4485714/normal_60660341e2f6e.pdf
    • https://static.s123-cdn-static.com/uploads/4408479/normal_5fff4a17cc6c2.pdf
    • https://cdn-cms.f-static.net/uploads/4485818/normal_60379d39e0832.pdf
    • https://wupibivuvofat.weebly.com/uploads/1/3/1/1/131164023/tumifod.pdf
    • https://static.s123-cdn-static.com/uploads/4471275/normal_5fe5ba796948b.pdf
    • https://cdn-cms.f-static.net/uploads/4409244/normal_605aa799afd53.pdf
    • https://cdn-cms.f-static.net/uploads/4467926/normal_606b05c15bc5b.pdf
    • https://cdn-cms.f-static.net/uploads/4465908/normal_601f5a7a10eb9.pdf
    • https://tozupefiga.weebly.com/uploads/1/3/4/2/134265365/592069.pdf
    • https://wivixilor.weebly.com/uploads/1/3/4/3/134371520/0db17edbaba0608.pdf
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/jomirix.pdf
    • https://cdn-cms.f-static.net/uploads/4372383/normal_60451004511d6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a3d.bin
3b99a97b066f2590e41f877e395fab5c2025aa009dd3c963f32bdaa7bc5b64dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3D 5216 bytes
font_01_sfnt_off00011be7.bin
5d4ac99d22e737c454a7129f8ec9bec34f8fbe6622ab3a32f8074764cf99583f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE7 11548 bytes
font_02_sfnt_off0001437a.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1437A 16164 bytes

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